Production process of economical solvent-free epoxy glass flake paint

Abstract

The invention discloses a production process of economical solvent-free epoxy glass flake paint, and relates to the field of paints.The production process comprises the following steps that S1, glass flakes are modified; the preparation method comprises the following steps: firstly, carrying out etching treatment on glass flakes, then adding a mixture of silica sol and magnesium lithium silicate, carrying out ultrasonic dispersion for 20-30 minutes, and drying; s2, preparing the component A; bisphenol A epoxy resin is added into the diluent to be dispersed at the first stirring speed, and then modified glass flakes, zinc phosphate and mica powder are sequentially added to be dispersed at the second stirring speed; filtering to obtain a component A; s3, during use, uniformly mixing the component A with the curing agent. The glass flakes are modified, a layer of hydrophobic substances and magnesium lithium silicate particles are attached to the surfaces of the glass flakes, the hydrophobic glass flakes good in dispersity are formed, a very coherent shielding layer can be achieved during application, the adhesive force of the glass flakes and resin is good, the hydrophobic substances can reduce attachment of external water, and therefore the glass flakes can be used as a shielding layer. The corrosion resistance of the coating is greatly improved.

Description

Technical Field

[0001] The present invention relates to the field of coatings, and in particular to a production process of an economical solvent-free epoxy glass flake paint. Background Art

[0002] Glass flake paint is a high-performance anti-corrosion paint made with tiny flaky glass as an anti-corrosion filler and polymer resin and curing agent as adhesives. Because the glass flakes in the paint have a fish-scale effect, thousands of scales are staggered, forming a complex and tortuous penetration and diffusion pathway within the coating. This makes the diffusion path of the corrosive medium quite tortuous, making it difficult to reach the substrate. This greatly prolongs the diffusion path of the corrosive medium in the coating, thereby effectively delaying the corrosion of the base material by the corrosive medium. However, the amount of glass flakes used has a significant impact on the shielding properties of the coating. When used in small amounts, a multi-layer shielding effect cannot be achieved, affecting the ability to resist medium penetration. When used in large amounts, the resin content will be relatively reduced, reducing the adhesion and mechanical strength of the coating. Some existing technologies mainly use organic solvents to reduce viscosity. The organic solvent content is high, and the anti-rust fillers used contain heavy metals, which are harmful to the environment. Summary of the Invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide an economical production process for solvent-free epoxy glass flake paint.

[0004] The technical solutions of the present invention are as follows:

[0005] A production process for an economical solvent-free epoxy glass flake paint comprises the following steps:

[0006] S1: modified glass flakes;

[0007] First, the glass flakes are etched, and then a mixture of silica sol and lithium magnesium silicate is added, ultrasonically dispersed for 20-30 minutes, and dried;

[0008] S2: prepare component A;

[0009] Add bisphenol A epoxy resin to the diluent and disperse at a first stirring rate, then add modified glass flakes, zinc phosphate and mica powder in sequence and disperse at a second stirring rate; filter to obtain component A;

[0010] S3: When using, mix component A and curing agent evenly.

[0011] Furthermore, in step S1, the etching process is specifically to ultrasonically treat the glass flakes in hydrogen peroxide for 20-50 minutes.

[0012] Furthermore, in step S1, the mass ratio of the glass flakes, silica sol and lithium magnesium silicate is 10:2:3-5.

[0013] Furthermore, in step S1, the particle size of the glass flakes is 100-200 mesh.

[0014] Furthermore, in step S2, the first stirring rate is 300-500 rpm, and the second stirring rate is 2000-3000 rpm.

[0015] Furthermore, in step S2, the diluent is propylene oxide butyl ether.

[0016] Furthermore, in step S2, the mass ratio of the bisphenol A epoxy resin, the diluent, the modified glass flakes, the zinc phosphate and the mica powder is 20-50:10-20:10-30:3-8:5-15.

[0017] The present invention also discloses an economical solvent-free epoxy glass flake paint, which is prepared by adopting the production process described in any one of the above items.

[0018] The beneficial effects of the present invention are: the economical solvent-free epoxy glass flake paint provided by the present invention modifies the glass flakes so that a layer of hydrophobic substance and lithium magnesium silicate particles are attached to the surface of the glass flakes to form a well-dispersed and hydrophobic glass flake, which can act as a very coherent shielding layer when used, and has good adhesion to the resin. Its hydrophobic substance can reduce the adhesion of external water, greatly improving the corrosion resistance of the coating. DETAILED DESCRIPTION

[0019] The following embodiments of the present invention are described in detail. The embodiments described below are exemplary and are only used to explain the present invention, and are not to be construed as limiting the present invention. Where specific techniques or conditions are not specified in the embodiments, the techniques or conditions described in the literature in this field or the product specifications are used. Where the manufacturer of the reagents or instruments is not specified, all are conventional products that can be obtained commercially.

[0020] The following epoxy curing agent uses epichlorohydrin.

[0021] Example 1

[0022] A production process for an economical solvent-free epoxy glass flake paint comprises the following steps:

[0023] S1: modified glass flakes;

[0024] The glass flakes were first etched, and then a mixture of silica sol and lithium magnesium silicate was added, ultrasonically dispersed for 25 minutes, and dried.

[0025] The etching process is specifically to ultrasonically treat the glass flakes in hydrogen peroxide for 30 minutes.

[0026] The mass ratio of the glass flakes, silica sol and lithium magnesium silicate is 10:2:3.

[0027] The particle size of the glass flakes is 150 mesh.

[0028] S2: prepare component A;

[0029] Add bisphenol A epoxy resin to the diluent and disperse at a first stirring rate, then add modified glass flakes, zinc phosphate and mica powder in sequence and disperse at a second stirring rate; filter to obtain component A;

[0030] The first stirring rate was 300 rpm, and the second stirring rate was 3000 rpm.

[0031] The diluent is propylene oxide butyl ether;

[0032] The mass ratio of the bisphenol A epoxy resin, diluent, modified glass flakes, zinc phosphate and mica powder is 30:15:17:3:13.

[0033] S3: When using, mix component A and epoxy curing agent in a mass ratio of 10:1.

[0034] Example 2

[0035] A production process for an economical solvent-free epoxy glass flake paint comprises the following steps:

[0036] S1: modified glass flakes;

[0037] The glass flakes were first etched, and then a mixture of silica sol and lithium magnesium silicate was added, ultrasonically dispersed for 25 minutes, and dried.

[0038] The etching process is specifically to ultrasonically treat the glass flakes in hydrogen peroxide for 40 minutes.

[0039] The mass ratio of the glass flakes, silica sol and lithium magnesium silicate is 10:2:4.

[0040] The particle size of the glass flakes is 200 mesh.

[0041] S2: prepare component A;

[0042] Add bisphenol A epoxy resin to the diluent and disperse at a first stirring rate, then add modified glass flakes, zinc phosphate and mica powder in sequence and disperse at a second stirring rate; filter to obtain component A;

[0043] The first stirring rate was 450 rpm, and the second stirring rate was 2500 rpm.

[0044] The diluent is propylene oxide butyl ether;

[0045] The mass ratio of the bisphenol A epoxy resin, diluent, modified glass flakes, zinc phosphate and mica powder is 35:16:18:7:514.

[0046] S3: When using, mix component A and epoxy curing agent in a mass ratio of 10:1.

[0047] Example 3

[0048] A production process for an economical solvent-free epoxy glass flake paint comprises the following steps:

[0049] S1: modified glass flakes;

[0050] The glass flakes were first etched, and then a mixture of silica sol and lithium magnesium silicate was added, ultrasonically dispersed for 30 minutes, and dried.

[0051] The etching process is specifically to ultrasonically treat the glass flakes in hydrogen peroxide for 20 minutes.

[0052] The mass ratio of the glass flakes, silica sol and lithium magnesium silicate is 10:2:5.

[0053] The particle size of the glass flakes is 200 mesh.

[0054] S2: prepare component A;

[0055] Add bisphenol A epoxy resin to the diluent and disperse at a first stirring rate, then add modified glass flakes, zinc phosphate and mica powder in sequence and disperse at a second stirring rate; filter to obtain component A;

[0056] The first stirring rate was 500 rpm, and the second stirring rate was 3000 rpm.

[0057] The diluent is propylene oxide butyl ether;

[0058] The mass ratio of the bisphenol A epoxy resin, diluent, modified glass flakes, zinc phosphate and mica powder is 50:10:10:3:15.

[0059] S3: When using, mix component A and epoxy curing agent in a mass ratio of 10:1.

[0060] Example 4

[0061] A production process for an economical solvent-free epoxy glass flake paint comprises the following steps:

[0062] S1: modified glass flakes;

[0063] The glass flakes were first etched, and then a mixture of silica sol and lithium magnesium silicate was added, ultrasonically dispersed for 26 minutes, and dried.

[0064] The etching process specifically involves ultrasonically treating the glass flakes in hydrogen peroxide for 38 minutes.

[0065] The mass ratio of the glass flakes, silica sol and lithium magnesium silicate is 10:2:4.5.

[0066] The particle size of the glass flakes is 180 mesh.

[0067] S2: prepare component A;

[0068] Add bisphenol A epoxy resin to the diluent and disperse at a first stirring rate, then add modified glass flakes, zinc phosphate and mica powder in sequence and disperse at a second stirring rate; filter to obtain component A;

[0069] The first stirring rate was 500 rpm, and the second stirring rate was 3000 rpm.

[0070] The diluent is propylene oxide butyl ether;

[0071] The mass ratio of the bisphenol A epoxy resin, diluent, modified glass flakes, zinc phosphate and mica powder is 40:17:20:8:15.

[0072] S3: When using, mix component A and epoxy curing agent in a mass ratio of 10:1.

[0073] Example 5

[0074] A production process for an economical solvent-free epoxy glass flake paint comprises the following steps:

[0075] S1: modified glass flakes;

[0076] The glass flakes were first etched, and then a mixture of silica sol and lithium magnesium silicate was added, ultrasonically dispersed for 25 minutes, and dried.

[0077] The etching process is specifically to ultrasonically treat the glass flakes in hydrogen peroxide for 40 minutes.

[0078] The mass ratio of the glass flakes, silica sol and lithium magnesium silicate is 10:2:3.5.

[0079] The particle size of the glass flakes is 170 mesh.

[0080] S2: prepare component A;

[0081] Add bisphenol A epoxy resin to the diluent and disperse at a first stirring rate, then add modified glass flakes, zinc phosphate and mica powder in sequence and disperse at a second stirring rate; filter to obtain component A;

[0082] The first stirring rate was 400 rpm, and the second stirring rate was 2800 rpm.

[0083] The diluent is propylene oxide butyl ether;

[0084] The mass ratio of the bisphenol A epoxy resin, diluent, modified glass flakes, zinc phosphate and mica powder is 29:19:20:8:11.

[0085] S3: When using, mix component A and epoxy curing agent in a mass ratio of 10:1.

[0086] Comparative Example 1

[0087] Different from Example 2, in step S1, the glass flakes are not etched.

[0088] Comparative Example 2

[0089] The difference from Example 2 is that in step S1, lithium magnesium silicate is not added.

[0090] Comparative Example 3

[0091] The difference from Example 2 is that in step S1, no silica sol is added.

[0092] Comparative Example 4

[0093] Different from Example 2, in step S1, the mixture of silica sol and lithium magnesium silicate is not added.

[0094] The performance of the above examples and comparative examples were tested, and the test results are shown in Table 1.

[0095] Table 1 Performance test results of the embodiments and comparative examples

[0096]

[0097]

[0098] It can be seen from the above table that the performance of the embodiment is better, mainly because the embodiment modifies the glass flakes so that a layer of hydrophobic substance and lithium magnesium silicate particles are attached to the surface of the glass flakes, forming a well-dispersed and hydrophobic glass flake, which can act as a very coherent shielding layer when used, and has good adhesion to the resin. The hydrophobic substance can reduce the adhesion of external water, greatly improving the corrosion resistance of the coating.

[0099] Under the premise that no conflict occurs, those skilled in the art may freely combine and superimpose the above-mentioned additional technical features.

[0100] The above-described embodiments merely represent preferred implementations of the present invention. While the descriptions thereof are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various other corresponding changes and modifications based on the technical solutions and concepts described above, and all such changes and modifications should fall within the scope of protection of the claims of the present invention.

Claims

1. A production process for an economical solvent-free epoxy glass flake paint, characterized in that: The following steps are involved: S1: modified glass flakes; First, the glass flakes are etched, and then a mixture of silica sol and lithium magnesium silicate is added, ultrasonically dispersed for 20-30 minutes, and dried; S2: prepare component A; Add bisphenol A epoxy resin to the diluent and disperse at a first stirring rate, then add modified glass flakes, zinc phosphate and mica powder in sequence and disperse at a second stirring rate; Filter to obtain component A; S3: When using, mix component A and curing agent evenly.

2. The production process of an economical solvent-free epoxy glass flake paint according to claim 1, characterized in that: In step S1, the etching process is specifically to ultrasonically treat the glass flakes in hydrogen peroxide for 20-50 minutes.

3. The production process of an economical solvent-free epoxy glass flake paint according to claim 1, characterized in that: In step S1, the mass ratio of the glass flakes, silica sol and lithium magnesium silicate is 10:2:3-5.

4. The production process of an economical solvent-free epoxy glass flake paint according to claim 1, characterized in that: In step S1, the particle size of the glass flakes is 100-200 mesh.

5. The production process of an economical solvent-free epoxy glass flake paint according to claim 1, characterized in that: In step S2, the first stirring rate is 300-500 rpm, and the second stirring rate is 2000-3000 rpm.

6. The production process of an economical solvent-free epoxy glass flake paint according to claim 1, characterized in that: In step S2, the diluent is propylene oxide butyl ether.

7. The production process of an economical solvent-free epoxy glass flake paint according to claim 1, characterized in that: In step S2, the mass ratio of the bisphenol A epoxy resin, the diluent, the modified glass flakes, the zinc phosphate and the mica powder is 20-50:10-20:10-30:3-8:5-15.

8. An economical solvent-free epoxy glass flake paint, characterized in that: The invention is prepared by the production process according to any one of claims 1 to 7.

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